- A
CoPP uses Modular QoS CLI (MQC) to define traffic classes and actions.
CoPP relies on MQC with class maps to match traffic and policy maps to define policing actions.
- B
CoPP is applied directly to physical interfaces to protect the control plane.
Why wrong: CoPP is applied globally to the control plane using the 'service-policy input' command under 'control-plane', not to individual interfaces.
- C
CoPP can be used to rate-limit traffic destined to the CPU, such as routing protocol packets or management traffic.
CoPP is designed to police traffic that is processed by the route processor, including OSPF, BGP, SSH, and SNMP.
- D
CoPP operates at Layer 2 to filter Ethernet frames before they reach the CPU.
Why wrong: CoPP operates at Layer 3 and above, classifying packets based on IP headers and upper-layer information, not Ethernet frames.
- E
CoPP replaces the need for access control lists (ACLs) on the device.
Why wrong: CoPP complements ACLs but does not replace them; ACLs are often used within class maps for CoPP classification.
Quick Answer
The answer is that CoPP can be used to rate-limit traffic destined to the CPU, such as routing protocol packets or management traffic. This is correct because Control Plane Policing (CoPP) applies a Modular QoS CLI (MQC) service policy directly to the control plane, classifying packets like OSPF hellos or SSH and policing them to protect the CPU from overload. On the Cisco CCNP ENARSI 300-410 exam, this concept tests your understanding of control plane protection mechanisms, often appearing in a “choose two” format where one distractor suggests CoPP is applied to interfaces—a common trap. Remember, CoPP works at Layer 3 and above, not Layer 2, and it complements ACLs rather than replacing them. A helpful memory tip: think of CoPP as a “CPU bouncer” that checks ID (classifies) and limits entry (polices) at the control plane door, not at the interface gate.
300-410 Control Plane Policing (CoPP) Practice Question
This 300-410 practice question tests your understanding of control plane policing (copp). Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO statements about Control Plane Policing (CoPP) are true? (Choose TWO.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
CoPP uses Modular QoS CLI (MQC) to define traffic classes and actions.
CoPP applies a QoS service policy to the control plane to rate-limit traffic, protecting the CPU from excessive packets. It uses MQC (class maps and policy maps) to classify and police traffic. CoPP is not applied to interfaces directly; it is applied to the control plane. It does not filter traffic at Layer 2; it works at Layer 3 and above. CoPP does not replace ACLs; it works alongside them.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
CoPP uses Modular QoS CLI (MQC) to define traffic classes and actions.
Why this is correct
CoPP relies on MQC with class maps to match traffic and policy maps to define policing actions.
Related concept
Standard ACLs match source addresses.
- ✗
CoPP is applied directly to physical interfaces to protect the control plane.
Why it's wrong here
CoPP is applied globally to the control plane using the 'service-policy input' command under 'control-plane', not to individual interfaces.
- ✓
CoPP can be used to rate-limit traffic destined to the CPU, such as routing protocol packets or management traffic.
- ✗
CoPP operates at Layer 2 to filter Ethernet frames before they reach the CPU.
Why it's wrong here
CoPP operates at Layer 3 and above, classifying packets based on IP headers and upper-layer information, not Ethernet frames.
- ✗
CoPP replaces the need for access control lists (ACLs) on the device.
Why it's wrong here
CoPP complements ACLs but does not replace them; ACLs are often used within class maps for CoPP classification.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Trap categories for this question
Command / output trap
CoPP is applied globally to the control plane using the 'service-policy input' command under 'control-plane', not to individual interfaces.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related 300-410 ACL questions on filtering logic and placement.
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Control Plane Policing (CoPP) — study guide chapter
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FAQ
Questions learners often ask
What does this 300-410 question test?
Control Plane Policing (CoPP) — This question tests Control Plane Policing (CoPP) — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: CoPP uses Modular QoS CLI (MQC) to define traffic classes and actions. — CoPP applies a QoS service policy to the control plane to rate-limit traffic, protecting the CPU from excessive packets. It uses MQC (class maps and policy maps) to classify and police traffic. CoPP is not applied to interfaces directly; it is applied to the control plane. It does not filter traffic at Layer 2; it works at Layer 3 and above. CoPP does not replace ACLs; it works alongside them.
What should I do if I get this 300-410 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related 300-410 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jun 18, 2026
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.
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